Convection Currents and the Mantle

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Vocabulary

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Heat Transfer-Movement of energy from a warm to a cooler object.
Radiation-Transfer of energy through empty space.
Conduction-Transfer by direct contact of particles.
Convection-Transfer by the movement of a heated movement.
Density-A measure of how much mass there is in a volume of a substance.
Convection Current-Flow that transfers heat with a fluid.

Outline

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• Heat Transfer

  • Radiation
  • Convection
    • Convection current
      • Take soup for example......
        • The more warm soup flows to the top.
        • The cooler soup sinks down.
          • Cooler soup more dense
          • More warm soup less dense.
          • Keeps going;constant flow.
  • Conduction

• Convection in Earth's mantle

  • Earth's mantle responds to heat.
  • Same thing happens in the Earth's mantle.
    • Cooler soup sinks
    • More warm soup flows to the top.
      • Convection currents have been flowing inside Earth for more than 4 billion years.

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